DNA was collected from the scenes of the crimes in Kent, west London, Hertfordshire and Surrey, but it was only when a neighbour rang Crimestoppers with suspicions about Imiela that the culprit was caught.

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DNA also linked the then unsolved case of Mrs Jankowitz, who died before the 2012 conviction, to Imiela when forensic experts reviewing unsolved cases matched his profile to the attack in Sydenham, south east London.

Sentencing him to 12 years, Judge John Bevan QC said in 2012: "You are wholly unrepentant about your life of guns, rape and general violence and, despite having served eight years of your life sentence, you have not expressed one jot of remorse."

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